Creating depth: The Haas effect

The Haas effect is a psycho-acoustic effect described by Helmut Haas as the ability of our ears to localize sounds coming from anywhere around us.

In short, our ears determine the position of a sound based on which ear perceives it first and its successive reflections (arriving within 1-35 ms from the initial sound) which, will give us the perception of depth and spaciousness. Pretty simple!